Nut-lock



J- W- B. COOK. NUT LOCK.

No. 534,201.. Patented Feb. 12, 1895.

dqliadjw FIE. 5 FIG- 4:- I

JWM' UNITED STATES "PATENT OFFICE.

JOHN W. B. COOK, OF CAMDEN, ARKANSAS.

NUT-LOCK.

SPECIFICATION forming part of Letters Batent No. 534,201, dated February12, 1895.

To all whom it may concern.-

Be it known that I, JOHN W. B. COOK, a citizen of the United States,residing at Camden, in the county of Ouaehit-a and State ofArkansas,have invented certain new and useful in gs, in which the sameparts are indicated by I within the nut.

the same letters throughout the several views.

Figure 1 represents a plan view of one of the improved nut locks inoperative position upon the bolt showing the nut in the locked position,and Fig. 2 is a similar view of one of the locks for the head of thebolt. Fig. 3 represents a sectional view on the line w m of Figs. 1 and2. Fig. 4 represents a plan view of one of the nut locks formed with twolooking devices, one of which is shown in its unlocked position. Fig. 5represents a sectional view on the line y y of Fig. 4.

In Fig. 1 is'illustrated the device for looking the nut to prevent thesame from turning upon the bolt and in Fig. 2 is illustrated the devicefor locking the head of the bolt to pre Vent the bolt from turning. Theformer consists of a plate A formed of resilient metal and perforated atits center as at a to receive the bolt. A curved slot at is formed inthe plate A concentric with the opening a, and at a distance therefromless than the radius of the circle 0 described by the corners of the nutwhen turned upon the bolt, and greater than the radius of the circle 0inscribed Another slot at is formed in the plate converging toward theslot at to a point a from which point the plate is cut across to theslot at leaving atongue. A. lhis tongue A [is bent upwardly as shown inFig. 5 so that its free end will be normally above the plate A.

A latch D having an enlarged circular head at cut away as at d, and alever arm 66 is pivoted as at (1 near the free end of the over uponitself as at E.

Application filed August 11,1894. Serial No- 520,072. (No model.)

I tongue A in such a position that when the lever arm d is parallel withthe slot a the free end of the tongue A will be free to spring up asshown in Figs. 1 and 5. When the tongue A is pressed down into the slotin the plate, the lever arm d may be turned to bring the headd over theend ofthe tongue (as shown at 01 in Fig. 4), and hold the said tonguedown so that the nut may be freely turned in either direction. I

Around hole a is formed at the beginning of each of the slots a and a toprevent the metal from cracking or splitting, and an opening a is formedat the opposite end. of the slot beyond the end of the tongue A havingits end undercut or inclined as at a, (in Fig. 5,) for a purpose to behereinafter explained.

In Fig. 2 is illustrated a device for holding the bolt from turning,consisting of a plate E perforated to receive the bolt as ate, and bentA hole 6 may be made in the said plate through which a nail may bedriven to hold the said plate from turning, or the corner of the platemay be bent down as at e and driven into the wood or in an indentationin the metal as the case may be;

The corners of the leaf E are preferably turned up as at e to guide thehead of the bolt to its seat.

In operation the bolt B is passed through the plate E (and the pieces Fto be secured by the bolt) so that its head B will rest upon the saidplate with one of its straight sides against the leaf E. The plate A isthen passed over the end of the bolt and the nut 13 placed on andscrewed down, the latch .D being in the open position shown in Fig. 1.As the nut is turned the corners passing round the circle 0 in thedirection of the arrow will press the tongue A down as they pass over itand the said tongue will spring up behind each corner thereby preventingthe nut from being turned back. When it is necessary to remove the nut,the latter may be turned in the direction of the arrow until the tongueA is pressed downfar enough to allow the latch D to be turned to bringits round head (2 over the corner of the tongue which will hold thelatter down and allow the nutto be unscrewed.

Should the nut in its locked position be so tight as to render itimpossible to turn it far enough to pass the tongue down, a nail, or

roa

other lever, may be inserted in the opening a) and pressed under theinclined side a (as shown in dotted lines at H in Fig. 5) and byforcingthet'ree end of the lever I-I down toward the plate the tonguemay be forced down and locked, as will be readily understood. The upperedge of the end of the tongue A is rounded or beveled as at a tofacilitate the gperation of latching it, and of removing the olt.

lhe plate A may be held in position by placing one of its straightsidesagainst some projecting part of the piece to be secured, by driving anail through one of the holes a or against one of its straight sides, orone of its corners may be bent down as shown by the,

ing tongues projecting above said plate to dotted line a.

In Fig. i I have shown a plate A having two seaecn to be turned over thetongues to hold the latter down, substantially as described.

2. In a nut lock the combination with a plate perforated to receive thebolt, and having tongues projecting above said plate to engage thecorners of the nut, latches pivoted on the said plate to pass over thesaid tongues and hold the same down out of engagement with the nuts, ofa plate perforated to receive the bolt and turned over upon itself toengage the head of the bolt and prevent the latter from turning, andmeans for securing the said plates from turning, substantially asdescribed.

3. In a nut lock the combination with a plate perforated to receive thebolt, and havengage the corners of a nut, and an opening having anunder'cut edge in which a lever may be inserted to force the saidtongues down, of latches pivoted near the ends of the said tonguesinpositionsto be turned over the tonguesto hold the latter down,substantially as described.

In testimony whereof I affix my signature in presence of twowitnesses.

JOHN .W. B. COOK. \Vitnesses:

E. B. CAWTI-ION, J. B. WINFREY.

